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A P-GRADE Portlet for Seismic Hazard Analysis
Dr. Cevat ŞenerDept. of Computer Engineering,
Middle East Technical University, 06800 Ankara, Turkey
OutlineNeed for SHAElements Demo VideoSuggested ImprovementWrap-up
Need for SHASeismic Hazard Analysis (SHA) is very important
for public safety and hazards mitigation in design and construction of highways, bridges, dams and
industrial buildings;for protection of energy facilities, special occupancy
structures like hospitals, schools and fire stations;for correct determination of earthquake insurance
premiumsHowever, this process is very expensive as involves many
models to be applied that need to access several types of data.
Hence, seismic hazard/risk maps are not kept up-to-date, or they may not be at required level of granularity.
... and when seismic risks are not considered properly ...
SRA SHA Seismic Hazard Analysis is core to Seismic
Risk Assessment:While SHA describes the EQ-related phenomena that have potential to cause harm and the associated occurrence frequencies,SRA assesses the probability of occurrence of losses as a result of the seismic hazard.
This application/portlet is named “SRA” for historical reasons, and then later renamed to “SHA”.
Elements
Engine
User Interaction
Data Repository
SDS InterfaceAlternative Models and Attenuations
Master EQ Source Model
User InteractionWeb-based GUI is a portlet on the P-GRADE
Portal. It is a multipage portlet
1. Project management2. Parameter set management 3. Detailed parameter settings4. Job management
JavaScript is used for Google Maps API Parameter value validation Visualization of output graphs
Directory structure for user/project/parameter-set management:
portal_work/users/<username>/sha|----- <project_1>| |---- -- <parameter_set_1>| | |------- parameters| | |------- job status & logs| | |------- outputs| |------- <parameter_set_2>| | |------- …| |------- …||----- <project_2>| |------- …||----- …
It allows embedding alternative models and attenuation relations.
Master EQ Source Model is embedded into the hazard calculations.
Its Engine handles the job management through WMS client tools of gLite.
Number of processors required by the application depends on the number of grids (sub-regions) that the site divided into.
Bash scripts are used for Grid job management.
It can access and use EQ catalog data served by SDS (Seismic Data Server)developed by Boğaziçi University,provides official lists of earthquakes, stations
and sensor information through a high-level interface through C++ iterators.
Data RepositoryIt maintains a data repository for EQ catalogs,
fault planes, area sources, site conditions, attenuation relations, produced results...
R*-tree index is used to access this repository on SEs.
Demo VideoDuration: <4 min.
StepsLogin to the P-GRADE Portal Check credentials, and switch to the SHA portletSubmit a job for a site in MKGo through the results of a previous job for a site in
TRCheck the status of the job for the MK siteGo through its results when done
Video: [click here]
Improvement to suggestProject management API
For handling a user-level hierarchical project structure
Maybe extended to provide a multi-user collaborative environment around projects (models)
Wrap-upIt is not straightforward
to go along with dynamically changing nature of the seismic hazard problem and
to produce up-to-date assessment figures continuously.
A Portal-based approach to attack the problem is introduced.
Thank you…Questions?
Acknowledgement:This study is supported by the FP7 SEE-GRID-SCI project, funded by the EC under the contract RI-211338.
